CVS log for src/sys/arch/powerpc/powerpc/bus_dma.c

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Additionally pull up following revision(s) (requested by rin in ticket #400):

	sys/arch/powerpc/include/oea/pmap.h: revision 1.39
	sys/arch/powerpc/include/pmap.h: revision 1.43
	sys/arch/powerpc/oea/pmap_kernel.c: revision 1.14
	sys/arch/powerpc/oea/pmap.c: revision 1.117
	sys/arch/powerpc/oea/pmap.c: revision 1.118
	sys/arch/powerpc/oea/pmap.c: revision 1.119
	sys/arch/powerpc/include/vmparam.h: revision 1.27
	sys/arch/powerpc/powerpc/trap.c: revision 1.165
	sys/arch/powerpc/oea/pmap.c: revision 1.120
	sys/arch/powerpc/oea/pmap.c: revision 1.121
	sys/arch/powerpc/powerpc/vm_machdep.c: revision 1.106
	sys/arch/powerpc/powerpc/bus_dma.c: revision 1.56

powerpc/oea: trap: pmap_{pte,ste}_spill() even in the interrupt context

Page table for oea is something like L2 TLB on memory; kernel and
processes share its entries, and process entries can be spilled out.

As done for MMU based on software-managed TLB, we need to restore
such entries even in the interrupt context.

Note that pmap_pte_spill() require no resouce to restore entries.
Still-not-implemented pmap_ste_spill() for OEA64 should also.
Part of PR kern/57621

powerpc/oea: pmap: Drop unused argument for pmap_pvo_reclaim(), NFC
Part of PR kern/57621

powerpc/oea: pmap: Rework pmap_pte_spill()

It was broken in many ways... Now, it gets working stable both for
OEA and OEA64_BRIDGE, as far as I can see.
Part of PR kern/57621

powerpc/oea: pmap: Fix mostly-pointless overhead of pmap_pvo_pool
(1) Drop __aligned(32) from struct pvo_entry; otherwise,
    sizeof(struct pvo_entry) is round-up'ed to a multiple of 32.
(2) Do not set sizeof(struct pvo_entry) to `align` argument for
    pool_init(9); it must be power of 2.
(3) Align pvo_entry to 32-byte boundary only if reasonably possible,
    i.e., OEA without DIAGNOSTIC (--> POOL_REDZONE) for now.
Part of PR kern/57621

powerpc/oea: pmap_create: Use PR_ZERO and drop memset(9), NFC
Part of PR kern/57621

powerpc: oea: For OEA64_BRIDGE, 1:1 map up to 3GiB memory
As done for OEA. Note that kva over 3GiB is reserved.

Provide PMAP_MAP_POOLPAGE for OEA64_BRIDGE at the same time, by
which direct-mapped memory is utilized in order to work around
starvation of 512MiB kernel virtual space.
PR kern/57621

powerpc: Make sure direct-mapped buffer fits within correct range

For OEA and OEA64_BRIDGE, only first 3GiB memory is direct-mapped.
Part of PR kern/57621

powerpc: Make sure direct-mapped buffer fits within correct range

For OEA and OEA64_BRIDGE, only first 3GiB memory is direct-mapped.

Part of PR kern/57621

s/functin/function/ in copy pasted comment.

powerpc: Sprinkle "memory" clobbers on eieio and nearby asm blocks.

Otherwise the compiler may reorder these around loads and stores,
which mostly defeats the purpose.  `asm volatile' just ensures the
instruction isn't _deleted_; it may still move around.

powerpc: Implement bus_dmamap_load_raw.

Can probably delete some of the round-trips between bus addresses and
physical addresses -- did these only to copy the logic already in
_bus_dmamap_load_buffer.

Include missing opt_ppcarch.h.

Style and cosmetic changes. No binary changes intended.

Merge changes from current as of 20200406

Sync with head.

Pull up following revision(s) (requested by rin in ticket #730):

	sys/arch/powerpc/conf/files.powerpc: revision 1.93
	sys/arch/powerpc/include/pio.h: revision 1.8
	sys/arch/powerpc/pic/intr.c: revision 1.27
	sys/arch/powerpc/powerpc/bus_dma.c: revision 1.50
	sys/arch/powerpc/powerpc/pio_subr.S: revision 1.17

Add PPC_IBM440 flag as 440 is significantly different from 40x processors.
(It may be more easily supported by booke than by ibm4xx.)

 -

eieio is implemented as sync on 40x. Therefore, "sync; eieio" and
"eieio; sync" can be replaced by a single sync.

eieio is implemented as sync on 40x. Therefore, "sync; eieio" and
"eieio; sync" can be replaced by a single sync.

Sync with HEAD

Sync with HEAD

Resolve a couple of conflicts (result of the uimin/uimax changes)

Rename min/max -> uimin/uimax for better honesty.

These functions are defined on unsigned int.  The generic name
min/max should not silently truncate to 32 bits on 64-bit systems.
This is purely a name change -- no functional change intended.

HOWEVER!  Some subsystems have

	#define min(a, b)	((a) < (b) ? (a) : (b))
	#define max(a, b)	((a) > (b) ? (a) : (b))

even though our standard name for that is MIN/MAX.  Although these
may invite multiple evaluation bugs, these do _not_ cause integer
truncation.

To avoid `fixing' these cases, I first changed the name in libkern,
and then compile-tested every file where min/max occurred in order to
confirm that it failed -- and thus confirm that nothing shadowed
min/max -- before changing it.

I have left a handful of bootloaders that are too annoying to
compile-test, and some dead code:

cobalt ews4800mips hp300 hppa ia64 luna68k vax
acorn32/if_ie.c (not included in any kernels)
macppc/if_gm.c (superseded by gem(4))

It should be easy to fix the fallout once identified -- this way of
doing things fails safe, and the goal here, after all, is to _avoid_
silent integer truncations, not introduce them.

Maybe one day we can reintroduce min/max as type-generic things that
never silently truncate.  But we should avoid doing that for a while,
so that existing code has a chance to be detected by the compiler for
conversion to uimin/uimax without changing the semantics until we can
properly audit it all.  (Who knows, maybe in some cases integer
truncation is actually intended!)

Synch with HEAD

M_CLUSTER -> M_EXT_CLUSTER

update from HEAD

Sync with HEAD

Sync with HEAD.  (Note that most of these changes are simply $NetBSD$
tag issues.)

"Make NetBSD great again!"

Introduce uvm_hotplug(9) to the kernel.

Many thanks, in no particular order to:

TNF, for funding the project.

Chuck Silvers - for multiple API reviews and feedback.
Nick Hudson - for testing on multiple architectures and bugfix patches.
Everyone who helped with boot testing.

KeK (http://www.kek.org.in) for hosting the primary developers.

sync with head

merge to -current.

Use kmem instead of malloc.  Remove unneeded <sys/malloc.h> includes.

Use ANSI prototype for _bus_dmamem_alloc_range.
Caught when compiling with -Wold-style-definition

Fix missed change of BUS_DMA_NOCACHE to BUS_DMA_DONTCACHE.

Enable new-style <sys/bus.h> on several PowerPC ports supporting PCI
buses.  Make non-inline implementations of bus_space(9) and bus_dma(9)
routines and move them to appropriate .c files.

This may leave amigappc in a bad state, sorry.  Fortunately, it will be
easy to repair by imitating the bus.h -> bus_{defs,funcs}.h split in
some other PowerPC port.

Modify mapiodev to take a third argument indicating whether the space
should be prefetchable (true) or not (false).

Catchup with rmind-uvmplock merge.

Use <sys/foo.h> instead of <machine/foo.h> if such a file exists.
Don't assume <sys/cpu.h> includes <powerpc/subarch/cpu*.h>.  Include it
explicitly.

Use ptoa(x) instead of x << PGSHIFT

sync with head

A small speedup, when mapping memory in bus_dmamem_map, if the memory is
cacheable and is in a single segment (physically contiguous) don't bother
allocating KVA for it, just use the physical address as the VA.

Sync with HEAD.

sync with head

Add support for BookE Freescale MPC85xx (e500 core) processors.
Add fast softint support for PowerPC (though only booke uses it).
Redo FPU/VEC support and add e500 SPE support.
Rework trap/intrs to use a common trapframe format.
Support SOFTFLOAT (no hardfloat or fpu emulation) for BookE.

Add booke support.

Use more VM_PHYSMEM_*() accessors.  No functional changes.

Machine dependent code is considered as part of UVM.  Include
internal API header.

Fix build.

Always use struct vm_physseg *vm_physmem_ptrs[] in MD code.

sync with head

Add a flags argument to pmap_kenter_pa(9).
Patch showed on tech-kern@ http://mail-index.netbsd.org/tech-kern/2009/11/04/msg006434.html
No objections.

Sync with HEAD.

Commit is split, to avoid a "too many arguments" protocol error.

sync with head.

Sync with HEAD.

ANSIfy another 1261 function definitions.
The only ones left in sys are beyond by sed script!
(or in sys/dist or sys/external)
Mostly they have function pointer parameters.

Sync w/ -current. 34 merge conflicts to follow.

sync with head.

Sync with HEAD.

Also fix build.

vm_page: put TAILQ_ENTRY into a union with LIST_ENTRY, so we can use both.

Sync with HEAD.

sync with head.

sync with head.

Remove clause 3 and 4 from TNF licenses

sync with HEAD

Sync with HEAD.

sync with head.

initialise "paddr_t lastaddr" to 0 in the cases it is not otherwise
set.  previously, if the stack garbage happened to match the
"curaddr" in _bus_dmamap_load_buffer(), the wrong thing may have
happened.

sync with head.

Sync with HEAD.

Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

sync with head.

sync with head.

Sync with head.

Change an instance of curaddr to PHYS_TO_BUS_MEM(t, curaddr) in
_bus_dmamap_load_buffer, otherwise when attempting to DMA a buffer larger
than PAGE_SIZE on an arch where PHYS != BUS it will allways fail.

sync with head.

sync with head

Apply the patch found in PR/28512 and PR/23801. Ok'd by a few people.
From the PR:
The cache is flushed using the bus address where the phys address
is required.  Errors would be seen only on ports where address
translation is done between the bus and physical memory.

sync with head.

Sync with head.

sync with head - hopefully this will work

sync with head.

fix mistakes in yamt-uio_vmspace changes.

merge yamt-uio_vmspace branch.

- use vmspace rather than proc or lwp where appropriate.
  the latter is more natural to specify an address space.
  (and less likely to be abused for random purposes.)
- fix a swdmover race.

adapt the rest of MD code.

Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

merge ktrace-lwp.

Sync with head.

sync with head.

bus_dmamem_map: honour BUS_DMA_NOWAIT.  noted by Manuel Bouyer.
bus_space_map: always do NOWAIT allocation as it used to be before yamt-km.

we have too many copies!

sync with -current

Sync with HEAD.

merge yamt-km branch.
- don't use managed mappings/backing objects for wired memory allocations.
  save some resources like pv_entry.  also fix (most of) PR/27030.
- simplify kernel memory management API.
- simplify pmap bootstrap of some ports.
- some related cleanups.

sync with head.  xen and whitespace.  xen part is not finished.

Add a dm_maxsegsz public member to bus_dmamap_t.  This allows a user of the API
to select the maximum segment size for each bus_dmamap_load (up to the maxsegsz
supplied to bus_dmamap_create).  dm_maxsegsz is reset to the value supplied to
bus_dmamap_create when the dmamap is unloaded.

Don't deref a NULL struct lwp *. This shouldn't happen, but...

- don't leave page mapping at kva which is being freed.
- convert to new apis.

Sync with HEAD.

bus_dmamap_load_mbuf(): Skip zero-length mbufs.
kern/24811

Fix the sync with head I botched.

Sync with HEAD.

Sync with HEAD.

In _bus_dmamap_load_buffer(), honour the maximum segment size specified
when the DMA map was created.

The previous behaviour honoured the maximum segment size only when
coalescing adjacent segments.

fix typo in comment

Sync with HEAD

Switch ibm4xx over to using the more flexible powerpc bus_space/bus_dma code.

__KERNEL_RCSID()

Apply the aborted ktrace-lwp changes to a specific branch.  This is just for
others to review, I'm concerned that patch fuziness may have resulted in some
errant code being generated but I'll look at that later by comparing the diff
from the base to the branch with the file I attempt to apply to it.  This will,
at the very least, put the changes in a better context for others to review
them and attempt to tinker with removing passing of 'struct lwp' through
the kernel.

Back out the lwp/ktrace changes. They contained a lot of colateral damage,
and need to be examined and discussed more.

Pass lwp pointers throughtout the kernel, as required, so that the lwpid can
be inserted into ktrace records.  The general change has been to replace
"struct proc *" with "struct lwp *" in various function prototypes, pass
the lwp through and use l_proc to get the process pointer when needed.

Bump the kernel rev up to 1.6V

Back out the last change after consultation with Matt Thomas. It hurts
platforms with fully functional bus snooping.

In _bus_dmamem_map(), make BUS_DMA_COHERENT behave the same way as
BUS_DMA_NOCACHE.

Make sure _bus_dmamap_load_mbuf() converts cpu-relative addresses
to bus-relative addresses.

Spotted by John Gordon, on port-powerpc@.

Cleanup dmamap_sync a bit and add a few more comments.  Add support for
cached physaddr's in mbufs.

Use PAGE_SIZE rather than NBPG.

Fix bus_dmamap_sync (add offset to ds->ds_addr when needed).
Add a set of parenthesis to PMAP_NC so it evaluates properly.

When mapping a page with BUS_SPACE_NOCACHE, make sure to flush the
physical page from the data cache.

Add preliminary support Marvell (Galileo) Discovery System Controllers.
This code was contributed by Allegro Networks.

Add a _bus_dmamap_sync which supports cache-incoherent implementations.
Support BUS_DMA_NOCACHE.

Sync with HEAD.

Avoid strict-alias warnings.

catch up with -current.

catch up with -current on kqueue branch

Catch up to -current.

move initialization of the "struct pglist" returned by uvm_pglistalloc()
from the calling code into uvm_pglistalloc() itself for consistency
and easier error handling

Catch up to -current.

file bus_dma.c was added on branch nathanw_sa on 2002-06-20 03:40:34 +0000

Pull avail_start/avail_end logic for bus_dmamem_alloc() from macppc port,
as suggested by matt@netbsd.org--the vm_physmem array may not be in order.

Include a common bus.h and bus_dma.c that powerpc ports can use
if they so choose.